ASTM A500 yog cov yeeb nkab carbon steel uas tau tsim los ntawm kev txias thiab tsis muaj qhov sib txuas rau kev vuam, riveted, lossis bolted choj thiab cov qauv tsev thiab cov hom phiaj dav dav.
Cov yeeb nkab qib C yog ib qho ntawm cov qib uas muaj lub zog siab ntawm tsis tsawg dua 345 MPa thiab lub zog tensile ntawm tsis tsawg dua 425 MPa.
Yog koj xav paub ntxiv txogASTM A500, koj tuaj yeem nyem mus saib nws!
ASTM A500 faib cov yeeb nkab hlau ua peb qib,qib B, qib C, thiab qib D.
CHS: Cov ntu khoob puag ncig.
RHS: Cov seem hollow square los yog rectangular.
EHS: Cov seem elliptical hollow.
Cov hlau yuav tsum ua los ntawm ib lossis ntau yam ntawm cov txheej txheem hauv qab no:cov pa oxygen yooj yim lossis lub cub hluav taws xob.
Cov kav dej yuav tsum tau ua los ntawm ib tugtsis muaj qhov tsis sib xwslos yog cov txheej txheem vuam.
Cov yeeb nkab vuam yuav tsum ua los ntawm cov hlau tiaj tiaj los ntawm cov txheej txheem vuam hluav taws xob (ERW). Qhov sib koom ua ke ntawm cov yeeb nkab vuam yuav tsum tau vuam hla nws qhov tuab kom lub zog tsim ntawm seem yeeb nkab tau lees paub.
ASTM A500 Qib C tuaj yeem raug annealed lossis kev ntxhov siab-relieve.
Kev ua kom kub hnyiab yog ua tiav los ntawm kev ua kom lub raj kub thiab tom qab ntawd maj mam txias nws. Kev ua kom kub hnyiab hloov kho qhov me me ntawm cov khoom kom txhim kho nws cov tawv thiab sib xws.
Feem ntau kev txo kev ntxhov siab yog ua tiav los ntawm kev ua kom cov khoom kub qis dua (feem ntau qis dua li ntawm kev annealing) ces tuav nws rau ib lub sijhawm thiab tom qab ntawd txias nws. Qhov no pab tiv thaiv kev cuam tshuam lossis tawg ntawm cov khoom thaum lub sijhawm ua haujlwm tom ntej xws li vuam lossis txiav.
Zaus ntawm kev ntsuam xyuasOb daim qauv yeeb nkab uas coj los ntawm txhua pawg ntawm 500 daim lossis ib feem ntawm nws, lossis ob daim qauv ntawm cov khoom siv dov tiaj tus uas coj los ntawm txhua pawg ntawm cov khoom siv dov tiaj tus sib xws.
Cov txheej txheem simCov txheej txheem thiab kev coj ua ntsig txog kev tshuaj ntsuam xyuas tshuaj lom neeg yuav tsum ua raws li Cov Txheej Txheem Xeem, Kev Xyaum, thiab Cov Lus A751.
| Cov Kev Xav Tau Tshuaj,% | |||
| Kev sau ua ke | Qib C | ||
| Kev Tshawb Fawb Kub | Kev Tshawb Fawb Txog Khoom | ||
| C (Cov pa roj carbon)A | siab tshaj plaws | 0.23 | 0.27 |
| Mn (Manganese)Ib | siab tshaj plaws | 1.35 | 1.40 |
| P (Phosphorus) | siab tshaj plaws | 0.035 | 0.045 |
| S (Sulfur) | siab tshaj plaws | 0.035 | 0.045 |
| Cu (Tooj liab)B | feeb | 0.20 | 0.18 |
| ARau txhua qhov kev txo qis ntawm 0.01 feem pua qis dua qhov siab tshaj plaws rau cov pa roj carbon, kev nce ntawm 0.06 feem pua ntawm qhov siab tshaj plaws rau manganese raug tso cai, txog li ntawm 1.50% los ntawm kev tshuaj xyuas cua sov thiab 1.60% kev tshuaj xyuas cov khoom lag luam. Byog tias cov hlau uas muaj tooj liab tau teev tseg rau hauv daim ntawv yuav khoom. | |||
Cov qauv tensile yuav tsum ua raws li cov kev cai ntawm Cov Txheej Txheem Xeem thiab Cov Lus Txhais A370, Appendix A2.
| Cov Kev Xav Tau Tensile | ||
| Daim Ntawv Teev Npe | Qib C | |
| Lub zog tensile, min | psi | 62,000 |
| MPa | 425 | |
| Lub zog tawm los, min | psi | 50,000 |
| MPa | 345 | |
| Kev ntev hauv 2 nti (50 hli), feeb,C | % | 21B |
| BSiv rau cov phab ntsa tuab uas tau teev tseg (t) sib npaug lossis ntau dua 0.120 nti [3.05 hli]. Rau cov phab ntsa tuab uas tau teev tseg sib dua, cov nqi elongation tsawg kawg nkaus yuav tsum yog los ntawm kev pom zoo nrog cov chaw tsim khoom. CCov nqi qis tshaj plaws uas tau teev tseg tsuas yog siv rau cov kev sim ua ntej xa khoom ntawm lub raj. | ||
Hauv kev sim, cov qauv no raug muab tso rau hauv lub tshuab kuaj tensile thiab tom qab ntawd maj mam ncab kom txog thaum nws tawg. Thoob plaws hauv cov txheej txheem, lub tshuab kuaj sau cov ntaub ntawv kev ntxhov siab thiab kev ntxhov siab, yog li tsim cov kab nkhaus kev ntxhov siab-kev ntxhov siab. Cov kab nkhaus no tso cai rau peb pom tag nrho cov txheej txheem los ntawm kev hloov pauv elastic mus rau kev hloov pauv yas mus rau kev tawg, thiab kom tau txais cov ntaub ntawv lub zog tso zis, lub zog tensile thiab elongation.
Qhov Ntev ntawm Cov QauvQhov ntev ntawm cov qauv siv rau kev kuaj yuav tsum tsis pub tsawg dua 2 1/2 nti (65 hli).
Kev sim ua kom duTsis muaj kev tawg lossis tawg, cov qauv raug tiaj tus ntawm cov phaj sib luag kom txog thaum qhov deb ntawm cov phaj tsawg dua tus nqi "H" xam los ntawm cov qauv hauv qab no:
H=(1+e)t/(e+t/D)
H = qhov deb ntawm cov phaj tiaj tiaj, nyob rau hauv. [mm],
e = kev hloov pauv ib chav ntev (tsis hloov pauv rau qib hlau, 0.07 rau Qib B, thiab 0.06 rau Qib C),
t = qhov tuab ntawm phab ntsa uas tau teev tseg, hauv. [mm],
D = txoj kab uas hla sab nraud uas tau teev tseg, hauv. [hli].
Kev ncaj nceestyogTxuas ntxiv ua kom daim qauv tiaj tus kom txog thaum daim qauv tawg lossis cov phab ntsa sib txawv ntawm daim qauv sib ntsib.
Ua tsis tiavcriteria: Cov khoom siv laminar peeling lossis cov khoom tsis muaj zog pom thoob plaws hauv qhov kev sim flattening yuav yog qhov ua rau tsis lees paub.
Kev sim flaring muaj rau cov raj puag ncig ≤ 254 hli (10 nti) hauv txoj kab uas hla, tab sis tsis yog qhov yuav tsum tau ua.
| Daim Ntawv Teev Npe | Scope | Lus Cim |
| Txoj kab uas hla sab nraud (OD) | ≤48 hli (1.9 nti) | ±0.5% |
| > 50 hli (2 nti) | ±0.75% | |
| Phab ntsa tuab (T) | Qhov tuab ntawm phab ntsa uas tau teev tseg | ≥90% |
| Ntev (L) | ≤6.5m (22ft) | -6 hli (1/4 nti) - +13 hli (1/2 nti) |
| >6.5m (22ft) | -6 hli (1/4 nti) - +19 hli (3/4) | |
| Kev Ncaj Ncees | Qhov ntev yog nyob rau hauv imperial units (ft) | L/40 |
| Cov chav ntev yog metric (m) | L/50 | |
| Cov kev cai rau kev kam rau siab rau qhov ntev ntsig txog cov hlau puag ncig | ||
Kev Txiav Txim Siab Txog Qhov Tsis Zoo
Cov qhov tsis zoo ntawm qhov chaw yuav tsum raug cais ua qhov tsis zoo thaum qhov tob ntawm qhov tsis zoo ntawm qhov chaw yog xws li qhov tuab ntawm phab ntsa seem tsawg dua 90% ntawm qhov tuab ntawm phab ntsa uas tau teev tseg.
Cov cim kho, cov pwm me me lossis cov cim dov, lossis cov qhov tsis tob tsis suav tias yog qhov tsis zoo yog tias lawv tuaj yeem tshem tawm hauv qhov txwv ntawm phab ntsa uas tau teev tseg. Cov qhov tsis zoo ntawm qhov chaw no tsis tas yuav tsum tau tshem tawm.
Kho Qhov Tsis Zoo
Cov qhov tsis zoo uas muaj phab ntsa tuab txog li 33% ntawm qhov tuab uas tau teev tseg yuav tsum raug tshem tawm los ntawm kev txiav lossis sib tsoo kom txog thaum pom cov hlau tsis muaj qhov tsis zoo.
Yog tias xav tau kev vuam tack, yuav tsum siv cov txheej txheem vuam ntub.
Tom qab ua kom tiav lawm, cov hlau ntau dhau yuav tsum tau muab tshem tawm kom tau ib qho chaw du.
Lub npe ntawm tus chaw tsim khoom, hom, lossis cov cim lag luam; lub npe qhia tshwj xeeb (tsis tas yuav muaj xyoo ntawm qhov teeb meem); thiab tsab ntawv qib.
Rau cov yeeb nkab uas muaj txoj kab uas hla sab nraud ntawm 4 nti [10 cm] lossis tsawg dua, cov ntaub ntawv qhia txog tus kheej raug tso cai rau ntawm cov ntawv lo uas txuas ruaj ntseg rau txhua pob yeeb nkab.
Kuj tseem muaj kev xaiv siv cov lej barcodes ua ib txoj kev txheeb xyuas ntxiv, thiab nws raug pom zoo kom cov lej barcodes yuav tsum sib xws nrog AIAG Standard B-1.
1. Kev tsim kho tsevCov hlau qib C feem ntau yog siv rau hauv kev tsim kho vaj tse uas xav tau kev txhawb nqa. Nws tuaj yeem siv rau cov thav duab loj, cov qauv ru tsev, cov plag tsev, thiab phab ntsa sab nraud.
2. Cov haujlwm tsim kho vaj tse: Rau cov choj, cov qauv cim kev loj, thiab cov ntaiv kom muab kev txhawb nqa thiab kev ruaj khov.
3. Cov chaw ua lag luam: hauv cov chaw tsim khoom thiab lwm qhov chaw ua haujlwm, nws tuaj yeem siv rau kev txhawb nqa, kev teeb tsa lub cev, thiab cov kem.
4. Cov qauv zog rov ua dua tshiab: Nws kuj tseem siv tau rau hauv kev tsim kho cua thiab hnub ci zog qauv.
5. Cov chaw ua si thiab cov khoom siv: cov qauv rau cov chaw ua si xws li cov chaw ua si bleachers, cov ncej hom phiaj, thiab txawm tias cov khoom siv qoj ib ce.
6. Cov tshuab ua liaj ua teb: Nws siv tau los tsim cov thav duab rau cov tshuab thiab cov chaw cia khoom.
Loj: Muab qhov ntev sab nraud thiab phab ntsa tuab rau cov yeeb nkab puag ncig; muab qhov ntev sab nraud thiab phab ntsa tuab rau cov yeeb nkab plaub fab thiab plaub fab.
Qhov ntauQhia tag nrho qhov ntev (feet los yog meters) los yog tus naj npawb ntawm cov qhov ntev uas xav tau.
NtevQhia hom ntev uas xav tau - random, ntau yam, lossis tshwj xeeb.
ASTM 500 Cov Lus Qhia Tshwj XeebQhia xyoo uas luam tawm cov lus qhia ASTM 500.
QibQhia qib khoom siv (B, C, lossis D).
Kev Tsim Khoom SivQhia tias cov khoom siv yog cov raj ua los ntawm txias.
Txoj Kev Tsim Khoom: Tshaj tawm seb cov yeeb nkab puas yog seamless lossis welded.
Siv Thaum KawgPiav qhia txog kev siv cov yeeb nkab
Cov Kev Cai Tshwj Xeeb: Sau lwm yam uas yuav tsum tau ua uas tsis suav nrog hauv cov lus qhia txheem.
Peb yog cov chaw tsim khoom thiab cov chaw muag khoom ntawm cov yeeb nkab carbon steel zoo los ntawm Tuam Tshoj, thiab peb kuj yog cov chaw muag khoom ntawm cov yeeb nkab steel seamless, muab ntau yam kev daws teeb meem rau koj!
Yog tias koj xav paub ntau ntxiv txog cov khoom yeeb nkab hlau, koj tuaj yeem tiv tauj peb!
